Energy storage devices and electrical equipment

Abstract

The present application discloses an energy storage device and electrical equipment, and relates to the field of energy storage technology. The energy storage device includes: a plurality of battery modules, which are located in the battery compartment of a battery box; a sampling assembly, including an isolation plate covering a plurality of battery cells corresponding to the battery module, and a circuit board connected to the battery cells of the corresponding battery module; the ends of the circuit boards included in the first sampling assembly and the second sampling assembly respectively have a plug connector and a first socket, and the first socket is fixed on the isolation plate of the second sampling assembly and plugged with the plug connector. In the embodiment of the present application, the sampling assembly is provided to include a circuit board, which simplifies the connection between the battery cell and the battery management system, and is convenient for improving the safety of electricity use; in addition, the first socket is directly fixed on the isolation plate included in the second sampling assembly, which is convenient for simplifying the fixation of the circuit board included in the second sampling assembly, and is convenient for realizing the integrated setting of the second sampling assembly to improve assembly efficiency.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage device and electrical equipment. Background Art

[0002] The existing battery pack includes a battery box and a battery module installed in the battery box. In the related technology, the operating parameters such as voltage and temperature of multiple battery cells included in the battery module are usually transmitted to the battery management system (Battery Management System, BMS) by wiring collection. Specifically, a wiring harness is arranged between the battery module and the battery management system. The wiring harness includes multiple connecting wires, one end of which is connected to the interface end of the BMS, and the other end is connected to the battery cell to collect the operating parameters of the battery cell. However, under the current trend of pursuing high energy density, the number of battery modules in the battery pack is increasing, and the number of battery cells will increase accordingly. Therefore, when the above-mentioned wiring collection method is adopted, the number of connecting wires will inevitably increase, which will cause the wire diameter of the wiring harness to increase, so that the wiring occupies too much internal space, resulting in low utilization of the internal space of the battery pack, increasing the manufacturing cost of the battery pack, and the number of connecting wires is large, the wiring harness is complicated, and the power safety is poor. Summary of the invention

[0003] A main purpose of the present application is to provide an energy storage device and an electrical equipment that simplifies the connection between a battery cell and a battery management system and improves the safety of electricity use.

[0004] In order to achieve the above application purpose, this application adopts the following technical solutions:

[0005] According to one aspect of the present application, there is provided an energy storage device, comprising: a battery box, comprising a lower box and a box cover, the box cover is connected to the lower box to enclose a battery compartment; a plurality of battery modules, located in the battery compartment, each of the battery modules comprising a pair of end plates arranged opposite to each other, and a plurality of battery cells located between the pair of end plates, the plurality of battery modules comprising a first battery module and a second battery module adjacent to each other in the length direction of the battery box; a plurality of sampling components, corresponding to the plurality of battery modules one by one, and each sampling component comprising an isolation plate and a circuit board, the isolation plate covering the plurality of battery cells of the corresponding battery module, the circuit board being located on a side of the isolation plate away from the battery cells, and connected to the plurality of battery cells of the corresponding battery module; wherein the plurality of sampling components comprise a first sampling component and a second sampling component respectively corresponding to the first battery module and the second battery module, the end of the circuit board included in the first sampling component close to the second sampling component comprises a plug connector, the end of the circuit board included in the second sampling component close to the first sampling component comprises a first socket, the first socket is fixed on the isolation plate included in the second sampling component, and the plug connector is plugged into the first socket.

[0006] In the implementation mode of the present application, the sampling component includes a circuit board, which avoids the setting of multiple connecting wires, thereby simplifying the connection between the battery cell and the battery management system, and avoiding the complicated connecting wires, so as to facilitate improving the power safety of the energy storage device; in addition, since the first socket is directly fixed on the isolation plate included in the second sampling component, it is convenient to simplify the fixation of the circuit board included in the second sampling component, and it is convenient to realize the integrated setting of the second sampling component to improve the assembly efficiency of the energy storage device.

[0007] According to one embodiment of the present application, the first socket includes a first fixing plate and a first plug-in base; the first fixing plate has a fixing hole, the second sampling assembly includes an isolation plate provided with a first hot melt column, the end of the first hot melt column has a first cap, the fixing hole is sleeved on the first hot melt column, and the first cap is crimped on the first fixing plate, the first plug-in base is fixed on the first fixing plate, and the first plug-in base is plugged into the plug connector.

[0008] In the embodiment of the present application, after the first fixing plate is sleeved on the first hot melt column on the isolation plate based on the fixing hole, the first fixing plate can be fixed on the isolation plate based on the hot melt process, thereby realizing the fixation of the first socket on the isolation plate. In addition, the first fixing plate is usually provided with a plurality of fixing holes, and the isolation plate is provided with a plurality of first hot melt columns corresponding to each other. At this time, the hot melt process can be used to realize a single hot melt of the plurality of first hot melt columns, so as to improve the fixing efficiency of the first fixing plate on the isolation plate.

[0009] According to an embodiment of the present application, the first hot melt column has a first step surface facing the first cover cap, and the first fixing plate is supported on the first step surface.

[0010] In the embodiment of the present application, the first step surface on the first hot melt column can be set to raise the limit height of the first connector on the isolation plate, thereby raising the height of the plug connector, so as to reduce the friction between the end of the circuit board close to the plug connector included in the first sampling component and the end plates of the first battery module and the second battery module, thereby extending the service life of the first sampling component.

[0011] According to an embodiment of the present application, the circuit board included in the first sampling component has a first redundant section, and the first redundant section is located on the end of the circuit board close to the plug connector.

[0012] In the implementation manner of the present application, a certain assembly margin can be provided by setting the first redundant section to ensure the normal plugging of the plug connector and the first socket; at the same time, it is ensured that the circuit board included in the first sampling component has a certain stretching margin, so as to slow down the pulling of the circuit board included in the first sampling component when the battery cells included in the first battery module and / or the second battery module expand, so as to avoid the circuit board from being torn due to pulling.

[0013] According to one embodiment of the present application, the first socket includes a first fixed plate and a first plug-in base, the first fixed plate is fixed on the isolation plate included in the second sampling assembly, the first plug-in base is fixed on the first fixed plate, at least a portion of the first plug-in base is located directly above the end plate included in the second battery module close to the first battery module, and the first plug-in base is plugged into the plug connector.

[0014] In an embodiment of the present application, a first plug-in base is arranged on a side of an end plate of the second battery module away from the bottom of the lower box body to shorten the distance between the first plug-in base and the plug connector. At the same time, behind the plug connector and the first plug-in base, friction between the circuit board included in the first sampling assembly and the end plate of the second battery module is effectively avoided.

[0015] According to one embodiment of the present application, the circuit board included in the first sampling component has a buffer pad on its surface facing the first battery module; the buffer pad is at least located in the area between the circuit board and the end plate included in the first battery module close to the second battery module.

[0016] In the embodiment of the present application, by providing the buffer pad, friction between the circuit board included in the first sampling component and the end plate included in the first battery module can be effectively avoided, thereby extending the service life of the first sampling component.

[0017] According to one embodiment of the present application, each of the multiple sampling components includes multiple bus bars and multiple sampling terminals, the multiple bus bars are located on the side of the isolation plate away from the battery cells, and each of the bus bars is connected to the multiple battery cells, the multiple sampling terminals are spaced apart along the length direction of the circuit board, and are all connected to the circuit board, and one sampling terminal is connected to one bus bar; the second sampling component includes a circuit board with a second redundant segment, and the second redundant segment is located between the first socket and a sampling terminal among the multiple sampling terminals that is adjacent to the first socket.

[0018] In the implementation mode of the present application, by setting the second redundant section, a certain assembly margin can be provided, so as to ensure that the fixing hole on the first fixing plate is sleeved on the first hot melt column of the isolation plate; at the same time, it is ensured that the circuit board included in the second sampling component has a certain stretching margin, so as to slow down the pulling of the circuit board included in the second sampling component when the battery cell included in the second battery module expands, so as to avoid the circuit board from being torn due to pulling.

[0019] According to one embodiment of the present application, the energy storage device includes a battery management system, which is located in the battery compartment and on the side of the second battery module away from the first battery module; the circuit board of the second sampling component includes a circuit acquisition board and a circuit transmission board, the circuit acquisition board and the circuit transmission board are stacked, the first socket is located at the end of the circuit transmission board away from the battery management system, and the circuit acquisition board has a second socket at the end close to the battery management system, and the circuit transmission board has a third socket at the end close to the battery management system; the second socket and the third socket are both fixed on the isolation board included in the second sampling component, and are both electrically connected to the battery management system.

[0020] In the embodiment of the present application, the second sampling component includes a circuit acquisition board and a circuit transmission board to simplify the arrangement of metal traces on the circuit board included in the second sampling component, and facilitate the arrangement of the circuit board included in the second sampling component on the isolation board included in the second sampling component.

[0021] According to one embodiment of the present application, the second socket includes a second fixed plate and a second plug-in base, and the third socket includes a third fixed plate and a third plug-in base; the second fixed plate and the third fixed plate are both fixed on the isolation plate included in the second sampling component, the second plug-in base is fixed on the second fixed plate, and the third plug-in base is fixed on the third fixed plate, and the second plug-in base and the third plug-in base are both located on the side of the end plate included in the second battery module away from the bottom of the lower box body.

[0022] In the embodiment of the present application, the second plug-in base and the third plug-in base are both located on the side of the end plate included in the second battery module away from the bottom of the lower box body, so as to shorten the distance between the second plug-in base, the third plug-in base and the battery management system. At the same time, after the second plug-in base and the third plug-in base are connected to the battery management system through the wiring harness, the contact between the wiring harness and the end plate of the second battery module can be effectively avoided, thereby avoiding contact between the wiring harness and the end plate of the second battery module, and extending the service life of the wiring harness.

[0023] According to one embodiment of the present application, the circuit transmission board is located between the circuit acquisition board and the isolation board; the circuit transmission board has a third redundant section close to the first socket, the end of the circuit acquisition board has a notch, and the third redundant section is exposed at the notch.

[0024] In an embodiment of the present application, a third redundant section is provided on the circuit transmission board to ensure that the end of the circuit transmission board close to the first socket has a certain stretching margin, thereby reducing the pulling on the circuit transmission board when the battery cells included in the second battery module expand, thereby avoiding the circuit transmission board from being torn due to pulling.

[0025] According to one embodiment of the present application, the circuit board has a limiting hole, the isolation plate is provided with a second hot melt column, the end of the second hot melt column has a second cap, the limiting hole is sleeved on the second hot melt column, and the second cap is located on the side of the circuit board away from the isolation plate.

[0026] According to one embodiment of the present application, the isolation plate has a first limiting groove, the circuit board is located in the first limiting groove, the bottom of the first limiting groove is provided with the second hot melt column, and the groove wall of the first limiting groove has an avoidance groove corresponding to the second hot melt column.

[0027] In the implementation manner of the present application, the avoidance groove is provided on the groove wall of the first limiting groove to avoid interference between the isolation plate and the hot melt equipment, thereby ensuring normal hot melting of the second hot melt column.

[0028] According to one embodiment of the present application, the end plate is an insulating plate and has a second step surface facing away from the bottom of the lower box body, and a mounting hole on the second step surface that passes through the end plate along the height direction of the battery box body; the battery module includes a locking bolt, the locking bolt has a locking cap, the locking bolt passes through the mounting hole and is fixedly connected to the bottom of the lower box body, and the locking cap abuts against the second step surface.

[0029] In an embodiment of the present application, a locking cap is arranged to abut against the second step surface of the end plate to increase the creepage distance between the output pole connecting piece and the locking cap of the locking bolt in the height direction of the battery box to avoid conduction between the output pole connecting piece and the locking bolt.

[0030] According to one aspect of the present application, an electric device is provided, the electric device comprising the energy storage device described in the above aspect, the energy storage device supplies power to the electric device.

[0031] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above-mentioned features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the accompanying drawings.

[0033] Figure 1 is a schematic diagram of an energy storage system according to an exemplary embodiment.

[0034] Figure 2 is a schematic diagram showing the structure of an energy storage device according to an exemplary embodiment.

[0035] Figure 3 FIG. 1 is a schematic diagram showing a structure in which a battery module is connected to a battery management system according to an exemplary embodiment.

[0036] Figure 4 yes Figure 3 A schematic diagram of a partially enlarged structure of the connection between the battery module and the battery management system is shown.

[0037] Figure 5 is a schematic diagram showing an exploded structure of a sampling assembly according to an exemplary embodiment.

[0038] Figure 6 is a schematic diagram showing an exploded structure of another sampling assembly according to an exemplary embodiment.

[0039] Figure 7 yes Figure 5 A schematic diagram of the partially enlarged structure of the sampling component is shown.

[0040] Figure 8 yes Figure 6 A schematic diagram of the structure of the sampling assembly is shown.

[0041] Fig. 9 yes Figure 8 A schematic diagram of the local enlarged structure of area A of the sampling component is shown.

[0042] Fig.10 yes Figure 8 A schematic diagram of the local enlarged structure of area B of the sampling component shown.

[0043] Fig.11 It is a schematic diagram of a local enlarged structure of another sampling component in area B according to an exemplary embodiment.

[0044] Fig.12 yes Figure 8 A schematic diagram of the local enlarged structure of the C area of ​​the sampling component is shown.

[0045] The reference numerals are described as follows:

[0046] 100, energy storage device; 200, electric energy conversion device; 300, user load;

[0047] 10. Battery box; 20. Battery module; 30. Sampling component; 40. Battery management system; 50. Wiring harness;

[0048] 11. Lower box body; 12. Box cover;

[0049] 21. end plate; 22. battery cell; 23. cable tie; 24. first battery module; 25. second battery module;

[0050] 211, mounting hole; 212, locking bolt; 213, locking cap; 214, second step surface;

[0051] 31. Isolation board; 32. Circuit board; 33. Sampling terminal; 34. Bus bar; 35. First sampling component; 36. Second sampling component;

[0052] 311, first hot melt column; 312, first step surface; 313, second hot melt column; 314, first limiting groove; 315, avoidance groove;

[0053] 321, first redundant section; 322, second redundant section; 323, limit hole; 324, circuit acquisition board; 325, circuit transmission board;

[0054] 3241, second plug socket; 3242, notch; 3243, second fixing plate; 3244, second plug base;

[0055] 3251, third plug socket; 3252, third fixing plate; 3253, third plug base; 3254, third redundant section;

[0056] 351, plug connector; 352, buffer pad;

[0057] 361. First plug socket; 362. First fixing plate; 363. First plug base; 364. Fixing hole. DETAILED DESCRIPTION

[0058] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0059] Since the energy people need is highly temporal and spatial, in order to rationally utilize energy and improve utilization, it is necessary to use a medium or device to store one form of energy in the same energy form, or convert it into another form of energy, and then release it in a specific energy form based on future applications.

[0060] At present, green energy mainly includes solar energy, wind energy, etc., which generally have problems of strong intermittency and large volatility, which will cause unstable voltage of the green power grid (not enough electricity during peak hours and too much electricity during low hours). Unstable voltage will cause damage to electricity. Therefore, it may cause the problem of "wind and solar power abandonment" due to insufficient electricity demand or insufficient grid acceptance capacity.

[0061] To solve the problem of insufficient electricity demand or insufficient grid acceptance capacity, we must rely on energy storage devices. That is, the energy storage device converts electrical energy into other forms of energy through physical or chemical means and stores it, and then converts the energy stored in the energy storage device into electrical energy when needed. In simple terms, the energy storage device is similar to a large "power bank", which stores electrical energy when there is sufficient light energy and wind energy, and releases the stored electrical energy when needed.

[0062] At present, energy storage (i.e. energy storage) has a wide range of application scenarios, including power generation side energy storage, grid side energy storage, renewable energy grid-connected energy storage and user side energy storage. The corresponding types of energy storage devices include:

[0063] (1) Large energy storage containers used in grid-side energy storage scenarios can serve as high-quality active and reactive power regulation power sources in the grid, achieve load matching of electric energy in time and space, enhance the ability to absorb renewable energy, and are of great significance in grid system backup, relieving peak load power supply pressure, and peak and frequency regulation;

[0064] (2) The main operating mode of small and medium-sized energy storage cabinets used in industrial and commercial energy storage scenarios (banks, shopping malls, etc.) on the user side and small household energy storage boxes used in home energy storage scenarios on the user side is "peak shaving and valley filling". Since there is a large price difference in electricity charges at peak and valley locations according to electricity demand, after users have energy storage equipment, in order to reduce costs, they usually charge the energy storage device (energy storage cabinet / box) during the low electricity price period; during the peak electricity price period, the electricity in the energy storage device is discharged for use to achieve the purpose of saving electricity bills. In addition, in remote areas and areas prone to natural disasters such as earthquakes and hurricanes, the existence of household energy storage devices is equivalent to users providing themselves and the power grid with backup power, eliminating the inconvenience caused by frequent power outages due to disasters or other reasons.

[0065] An embodiment of the present application provides an energy storage system, which includes an energy storage device to store or supply electric energy through the energy storage device.

[0066] Taking the outdoor energy storage scenario in grid-side energy storage as an example, Figure 1 A schematic diagram of an energy storage system provided by an embodiment of the present application is illustrated, such as Figure 1 As shown, the energy storage system includes an energy storage device 100, an electric energy conversion device 200 and a user load 300. The electric energy conversion device 200 (including a solar energy conversion device and a wind energy conversion device) is electrically connected to the energy storage device 100, and the energy storage device 100 is electrically connected to the user load 300. In this way, other forms of energy such as solar energy and wind energy can be converted into electric energy through the electric energy conversion device 200, and stored through the energy storage device 100, and then supplied to the user load 300 for use through the energy storage device 100 when the electricity price is peak, or supplied to the user load 300 for use through the energy storage device 100 when the power grid is off / power outage.

[0067] Among them, the energy storage device 100 can be a battery module 20, a battery pack, a battery box, a battery system, etc. composed of battery cells 22. The battery cell 22 can be a lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, a magnesium-ion battery, etc., and the battery cell 22 can be a cylinder, a flat body, a rectangular parallelepiped, etc., and the implementation method of the present application is not limited to this. Specifically, the battery cell 22 can realize the charging and discharging process by chemical reactions or changes of energy storage media (chemical elements). Simply put, the electric energy generated by light energy and wind energy is stored in the battery cell 22 through the chemical reaction or change of the energy storage medium. When the use of external electric energy reaches a peak, the electric energy stored in the battery cell 22 is released for use through the chemical reaction or change of the energy storage medium, or transferred for use.

[0068] In some embodiments, Figure 2As shown, the energy storage device 100 includes a battery case 10, a plurality of battery modules 20 and a plurality of sampling assemblies 30. The battery case 10 includes a lower case 11 and a case cover 12, and the case cover 12 is fixedly connected to the lower case 11 to form a battery compartment; the plurality of battery modules 20 are located in the battery compartment, the plurality of sampling assemblies 30 correspond one-to-one to the plurality of battery modules 20, and each sampling assembly 30 is located at the top of the corresponding battery module 20.

[0069] The battery modules 20 contained in the battery compartment of the battery box 10 may be 4, 6, 8, etc., and the more battery modules 20 there are, the higher the capacity of the energy storage device 100 is, so that it is easier to meet the needs of the market. For example, the battery compartment of the battery box 10 contains 2 rows of battery modules 20 along the length direction X of the battery box 10 and 4 columns of battery modules 20 along the width direction Y of the battery box 10, that is, 8 battery modules 20 are contained in the battery compartment.

[0070] like Figure 3 As shown, the battery module 20 includes a pair of end plates 21 disposed opposite to each other, and a plurality of battery cells 22 located between the pair of end plates 21. The plurality of battery cells 22 and the pair of end plates 21 can be fixed by a binding tool such as a cable tie 23. Figure 3 and Figure 4 As shown, the end plate 21 has a mounting hole 211 that passes through the battery box body 10 in the height direction, and the battery module 20 includes a locking bolt 212, and the locking bolt 212 has a locking cap 213. The locking bolt 212 passes through the mounting hole 211 and is fixedly connected to the bottom of the lower box body 11, and the locking cap 213 abuts against the end face of the hole opening of the mounting hole 211 to fix the battery module 20 in the battery compartment.

[0071] The end plate 21 can be a metal structure such as an aluminum metal plate, or an insulating structure such as a thermoplastic plastic. When the end plate 21 is a metal structure, an insulating base is fixed to the end plate 21, and the output pole connecting piece connected to the battery cell 22 is limited on the insulating base to ensure the creepage distance between the output pole connecting piece and the end plate 21 and the locking cap 213, and avoid conduction between the output pole connecting piece and the end plate 21 and the locking bolt 212. When the end plate 21 is an insulating structure, the output pole connecting piece connected to the battery cell 22 is directly supported on the end face of the end plate 21, and as shown in FIG. Figure 4 As shown, the end plate 21 has a second step surface 214 facing away from the bottom of the lower case 11, and the mounting hole 211 passes through the end plate 21 on the second step surface 214. At this time, the locking cap 213 of the locking bolt 212 abuts against the second step surface 214; in this way, the creepage distance between the output pole connecting plate and the locking cap 213 of the locking bolt 212 can be increased in the height direction of the battery case 10 to avoid conduction between the output pole connecting plate and the locking bolt 212.

[0072] Compared with the case where the end plate 21 is a metal structure as described above, the end plate 21 is set as an insulating structure, which can reduce the setting of the insulating base on the end plate 21, so as to simplify the structure of the battery module 20 and improve the assembly efficiency of the battery module 20. In addition, the distance between the second step surface 214 and the end surface of the end plate 21 facing away from the bottom of the lower box body 11 is greater than the thickness of the locking cap 213, so as to ensure that the locking cap 213 of the locking bolt 212 does not protrude from the end surface of the end plate 21 facing away from the bottom of the lower box body 11.

[0073] like Figure 5 or Figure 6 As shown, the sampling assembly 30 includes an isolation plate 31 and a circuit board 32 . The isolation plate 31 covers a plurality of battery cells 22 of the corresponding battery module 20 . The circuit board 32 is located on a side of the isolation plate 31 away from the battery cells 22 and is connected to the plurality of battery cells 22 of the corresponding battery module 20 .

[0074] Among them, Figure 4 As shown, the sampling component 30 includes a circuit board 32 connected to the battery management system 40, so that the setting of multiple connecting wires is avoided through the setting of the circuit board 32, thereby simplifying the connection between the battery cell 22 and the battery management system 40, and avoiding the complicated connection wires, which is convenient for improving the power safety of the energy storage device 100.

[0075] The circuit board 32 is a flexible thin plate with metal traces, and the circuit board 32 includes two layers of insulating films and metal traces sandwiched between the two layers of insulating films. For example, the circuit board 32 may be an FPC (Flexible Printed Circuit) or an FFC (Flexible Flat Cable). In addition, positioning holes are provided on the circuit board 32, so that when the metal traces of the circuit board 32 are made, the insulating film included in the circuit board 32 can be fixed through the positioning holes to ensure the production yield of the metal traces.

[0076] The isolation plate 31 may be a plate-shaped structure made of insulating materials such as a plastic plate, and the circuit board 32 is limited on the isolation plate 31 to prevent the circuit board 32 from shaking when the sampling assembly 30 is carried. Specifically, the circuit board 32 may be directly limited on the isolation plate 31, or may be pre-positioned on the isolation plate 31 first and then limited on the isolation plate 31 to improve the assembly efficiency of the circuit board 32 on the isolation plate 31.

[0077] Alternatively, if Figure 5 and Figure 7 ,or Figure 8 and Fig. 9As shown, the circuit board 32 has a limiting hole 323, and the isolation plate 31 is provided with a second hot melt column 313. The end of the second hot melt column 313 has a second cap (not shown in the figure), the limiting hole 323 is sleeved on the second hot melt column 313, and the second cap is located on the side of the circuit board 32 away from the isolation plate 31.

[0078] In this way, after the circuit board 32 is sleeved on the second hot melt column 313 on the isolation plate 31 based on the limiting hole 323, the circuit board 32 can be directly limited on the isolation plate 31 based on the hot melt process. In addition, the circuit board 32 is usually provided with a plurality of limiting holes 323, and the isolation plate 31 is provided with a plurality of second hot melt columns 313 corresponding to each other. At this time, the plurality of second hot melt columns 313 can be hot melted once based on the hot melt process to improve the fixing efficiency of the circuit board 32 on the isolation plate 31.

[0079] The second heat-melting column 313 and the isolation plate 31 are integrally formed to improve the tightness of the connection between the second heat-melting column 313 and the isolation plate 31, thereby ensuring the stability of the circuit board 32 fixed on the isolation plate 31. In addition, the opening size of the upper limit hole 323 (long round hole) on the circuit board 32 is larger than the cross-sectional size of the second heat-melting column 313 on the isolation plate 31, so as to ensure that after the circuit board 32 is limited and fixed by the second heat-melting column 313, the circuit board 32 still has a certain margin of activity, thereby reducing the situation where the battery cell 22 pulls the circuit board 32 after thermal expansion, causing the circuit board 32 to tear.

[0080] It should be noted that the circuit board 32 can be fixed on the isolation plate 31 by locking screws (such as insulating bolts) in addition to the hot melt fixation described above, and the present application does not limit this. Compared with the situation where the circuit board 32 is fixed on the isolation plate 31 by locking screws, the circuit board 32 is limited by hot melt of the second hot melt column 313, which can avoid damage to the isolation plate 31 and ensure the integrity of the isolation plate 31.

[0081] Furthermore, if Figure 5 and Figure 7 or Figure 8 and Fig. 9 As shown, the isolation plate 31 has a first limiting groove 314 facing away from the battery cell 22, the circuit board 32 is located in the first limiting groove 314, and a second hot melt column 313 is provided at the bottom of the first limiting groove 314. In this way, the circuit board 32 can be placed in the first limiting groove 314 on the isolation plate 31 in advance to achieve pre-positioning of the circuit board 32, and then the second hot melt column 313 is used to fix the circuit board 32 in the limiting position, thereby improving the fixing efficiency of the circuit board 32.

[0082] When the second hot melt column 313 is close to the groove wall of the first limiting groove 314, in order to prevent the isolation plate 31 from interfering with the hot melt device in hot melting the second hot melt column 313, it can be as follows: Figure 7 or Fig. 9 As shown, the groove wall of the first limiting groove 314 has an avoidance groove 315 corresponding to the second hot melt column 313. In this way, by setting the avoidance groove 315, interference between the isolation plate 31 and the hot melt device is avoided, and normal hot melt of the second hot melt column 313 is ensured.

[0083] For the connection between the circuit board 32 and the battery cell 22, as shown in FIG. Figure 5 or Figure 6 As shown, each sampling assembly 30 of the multiple sampling assemblies 30 includes multiple sampling terminals 33 (such as connecting nickel sheets) and multiple bus bars 34. The multiple bus bars 34 are located on the side of the isolation plate 31 away from the battery cells 22, and each bus bar 34 is connected to multiple battery cells 22. The multiple sampling terminals 33 are distributed at intervals along the length direction of the circuit board 32 and are all connected to the circuit board 32. One sampling terminal 33 is connected to one bus bar 34.

[0084] Among them, for the connection between the busbar 34 and the multiple battery cells 22, each battery cell 22 has positive and negative electrode terminals, and the multiple battery cells 22 of the battery module 20 can be connected in series or in series-parallel after being connected through the multiple busbars 34. When the multiple battery cells 22 are in a series connection relationship, each busbar 34 is respectively connected to the electrode terminals of different polarities on two battery cells 22 to realize the sequential series connection of the multiple battery cells 22. When the multiple battery cells 22 are in a series-parallel connection relationship, each busbar 34 is connected to the electrode terminals of two groups of battery cells 22, and the polarity of the electrode terminals of each group of battery cells 22 is the same, and the polarity of the electrode terminals of different groups of battery cells 22 is different, so as to realize the series-parallel connection of the multiple battery cells 22. For example, each busbar 34 is connected to the electrode terminals of two pairs of battery cells 22, and the polarity of the electrode terminals of each pair of battery cells 22 is the same, and the polarity of the electrode terminals of the two pairs of battery cells 22 is different, so as to realize the series connection of the multiple battery cells 22 after being connected in parallel.

[0085] In addition, the isolation plate 31 has a plurality of second limiting grooves facing away from the battery cell 22, and the plurality of second limiting grooves correspond one-to-one to the plurality of bus bars 34. Each bus bar 34 is located in the corresponding second limiting groove to achieve the limitation of the bus bar 34 on the isolation plate 31, thereby preventing the bus bar 34 from shaking when carrying the sampling assembly 30, causing the connection between the bus bar 34 and the battery cell 22 and the sampling terminal 33 to become loose.

[0086] As for the limiting of the bus 34 in the second limiting groove on the isolation plate 31, reference can be made to the hot-melt fixation of the circuit board 32 in the first limiting groove 314 described above, so as to ensure the stability of the limiting of the bus 34 in the second limiting groove, and further ensure the reliability of the connection between the bus 34 and the electrode terminals of the battery cell 22.

[0087] In some embodiments, Figure 3 and Figure 4 As shown, the energy storage device 100 further includes a battery management system 40, which is located in the battery compartment of the battery box 10, and the sampling assembly 30 (circuit board 32) corresponding to each battery module 20 is connected to the battery management system 40 through a wiring harness 50. In this way, the operating parameters of the battery cells 22 included in the multiple battery modules 20 can be obtained through the battery management system 40 to realize the monitoring of the multiple battery cells 22.

[0088] In some embodiments, Figure 3 ,as well as Figure 5 or Figure 6 As shown, multiple battery modules 20 include a first battery module 24 and a second battery module 25 adjacent to each other in the length direction X of the battery case 10; multiple sampling components 30 include a first sampling component 35 and a second sampling component 36 corresponding to the first battery module 24 and the second battery module 25 respectively, the first sampling component 35 includes a circuit board 32 having a plug connector 351 at an end near the second sampling component 36, the second sampling component 36 includes a circuit board 32 having a first socket 361 at an end near the first sampling component 35, the first socket 361 is fixed on the isolation plate 31 included in the second sampling component 36, and the plug connector 351 is plugged into the first socket 361.

[0089] Since the first socket 361 is directly fixed on the isolation plate 31 included in the second sampling component 36, it is convenient to simplify the fixation of the circuit board 32 included in the second sampling component 36, and it is convenient to realize the integrated setting of the second sampling component 36 to improve the assembly efficiency of the energy storage device 100; in addition, the first socket 361 can be directly fixed on the isolation plate 31, thereby avoiding the auxiliary parts (such as the fixing seat) set when the first socket 361 is fixed on the end plate 21, so as to simplify the assembly of the second sampling component 36 on the second battery module 25; furthermore, by plugging the circuit boards 32 included in the first sampling component 35 and the second sampling component 36, it is convenient to realize the connection between the circuit boards 32 included in the first sampling component 35 and the second sampling component 36 and the battery management system 40, thereby simplifying the connection between the battery cells 22 included in the first battery module 24 and the second battery module 25 and the battery management system 40.

[0090] Among them, for the plug connector 351 of the circuit board 32 included in the first sampling component 35, the first plug socket 361 of the circuit board 32 included in the second sampling component 36, as shown in FIG. Figure 5 As shown, the plug connector 351 is located on the end of the circuit board 32 included in the first sampling component 35 close to the second battery module 25, and the first socket 361 is located on the end of the circuit board 32 included in the second sampling component 36 close to the first battery module 24, that is, the plug connector 351 and the first socket 361 are arranged adjacent to each other to facilitate the connection between the plug connector 351 and the first socket 361.

[0091] In some embodiments, Figure 7 ,or Figure 8 and Fig.10 As shown, the first socket 361 includes a first fixing plate 362 and a first plug-in base 363; the first fixing plate 362 has a fixing hole 364, the second sampling component 36 includes an isolation plate 31 on which a first hot melt column 311 is provided, the end of the first hot melt column 311 has a first cap (not shown in the figure), the fixing hole 364 is sleeved on the first hot melt column 311, and the first cap is crimped on the first fixing plate 362; the first plug-in base 363 is fixed on the first fixing plate 362, and the first plug-in base 363 is plugged into the plug connector 351.

[0092] In this way, after the first fixing plate 362 is sleeved on the first hot melt column 311 on the isolation plate 31 based on the fixing hole 364, the first fixing plate 362 can be fixed on the isolation plate 31 based on the hot melt process, thereby realizing the fixation of the first socket 361 on the isolation plate 31. In addition, the first fixing plate 362 is usually provided with a plurality of fixing holes 364, and the isolation plate 31 is provided with a plurality of first hot melt columns 311 corresponding to each other. At this time, the plurality of first hot melt columns 311 can be hot melted once based on the hot melt process to improve the fixing efficiency of the first fixing plate 362 on the isolation plate 31.

[0093] The first heat-melting column 311 and the isolation plate 31 are integrally formed to improve the tightness of the connection between the first heat-melting column 311 and the isolation plate 31, thereby ensuring the stability of the first fixing plate 362 fixed on the isolation plate 31. In addition, the opening size of the fixing hole 364 (long round hole) on the first fixing plate 362 is larger than the cross-sectional size of the first heat-melting column 311 on the isolation plate 31, so as to ensure that the fixing hole 364 on the first fixing plate 362 can be sleeved on the first heat-melting column 311, ensuring the assembly of the circuit board 32 on the isolation plate 31, and at the same time, after the first fixing plate 362 is limited and fixed by the first heat-melting column 311, the first fixing plate 362 still has a certain margin of activity, thereby reducing the situation where the battery cell 22 pulls the first socket 361 after thermal expansion, causing the first socket 361 to tear.

[0094] It should be noted that when the first fixing plate 362 is limited on the isolation plate 31 by hot melting, an avoidance groove 315 corresponding to the first hot melting column 311 can be provided on the isolation plate 31 to avoid the hot melting device and avoid interference with the hot melting device. In addition, the limiting fixation of the first fixing plate 362 on the isolation plate 31 can be achieved by locking screws (such as insulating bolts) in addition to the hot melting fixation described above. Of course, the first fixing plate 362 can also be fixed to the isolation plate 31 by bonding, and the implementation of this application does not limit this. Compared with the situation where the first fixing plate 362 is fixed to the isolation plate 31 by locking screws, the limiting of the first fixing plate 362 by hot melting of the first hot melting column 311 can avoid damage to the isolation plate 31 and ensure the integrity of the isolation plate 31.

[0095] Optionally, for the above-mentioned situation that the first fixing plate 362 is fixed on the isolation plate 31 by the first hot melt column 311, it can also be as follows: Fig.10 As shown, the first hot melt column 311 has a first step surface 312 facing the first cap, and the first fixing plate 362 is supported on the first step surface 312. In this way, the first step surface 312 on the first hot melt column 311 can be set to raise the limit height of the first plug seat 361 on the isolation plate 31, thereby raising the height of the plug connector 351, so as to reduce the friction between the end of the circuit board 32 of the first sampling component 35 near the plug connector 351 and the end plate 21 of the first battery module 24 and the second battery module 25, thereby extending the service life of the first sampling component 35.

[0096] Of course, in addition to setting the first step surface 312 facing the first cap on the first hot melt column 311, the plug connector 351 can also include a support plate and a socket, the socket is fixed on the support plate, and the socket is plugged with the first plug base 363 included in the first socket 361. In this way, the height of the socket included in the plug connector 351 can be directly raised by the support plate, thereby reducing the friction between the end of the circuit board 32 included in the first sampling component 35 near the plug connector 351 and the end plate 21 of the first battery module 24 and the second battery module 25, thereby extending the service life of the first sampling component 35.

[0097] In some embodiments, Figure 7 or Fig.10 As shown, the circuit board 32 included in the first sampling component 35 has a first redundant section 321 , and the first redundant section 321 is located at an end of the circuit board 32 close to the plug connector 351 .

[0098] In this way, when the plug connector 351 is plugged into the first socket 361, a certain assembly margin can be provided by the setting of the first redundant section 321, so as to ensure the normal plugging of the plug connector 351 and the first socket 361; at the same time, it is ensured that the circuit board 32 included in the first sampling component 35 has a certain stretching margin, so as to slow down the pulling of the circuit board 32 included in the first sampling component 35 when the battery cells included in the first battery module 24 and / or the second battery module 25 expand, so as to avoid the circuit board 32 from being torn due to pulling.

[0099] At least a portion of the first redundant segment 321 is located between the first battery module 24 and the second battery module 25 .

[0100] Optionally, in combination with the above-mentioned situation that the first plug-in base 361 includes the first fixing plate 362 and the first plug-in base 363, at least part of the first plug-in base 363 may be located directly above the end plate 21 of the second battery module 25 that is close to the first battery module 24 (i.e., the side away from the bottom of the lower box 11). In this way, it is convenient to shorten the distance between the first plug-in base 363 and the plug connector 351, and at the same time, after the plug connector 351 and the first plug-in base 363 are connected, it can effectively avoid the contact between the circuit board 32 included in the first sampling component 35 and the end plate 21 of the second battery module 25, thereby avoiding the friction between the circuit board 32 included in the first sampling component 35 and the end plate 21 of the second battery module 25, thereby extending the service life of the first sampling component 35.

[0101] Among them, the end of the isolation plate 31 included in the second sampling component 36 may extend out of the battery cell 22 to be located directly above the end plate 21 included in the second battery module 25, so that after the first plug-in socket 361 is fixed on the isolation plate 31, the first plug-in base 363 is located on the side of the end plate 21 of the second battery module 25 away from the bottom of the lower box body 11; or after the first fixing plate 362 is fixed on the end plate 21 of the second battery module 25, at least part of the first fixing plate 362 is located directly above the end plate 21 included in the second battery module 25, so that after the first plug-in base 363 is fixed on the first fixing plate 362, the first plug-in base 363 is located on the side of the end plate 21 of the second battery module 25 away from the bottom of the lower box body 11.

[0102] In some embodiments, Fig.11 As shown, the circuit board 32 of the first sampling assembly 35 has a buffer pad 352 on its surface facing the first battery module 24 , and the buffer pad 352 is at least located in a region between the circuit board 32 and the end plate 21 of the first battery module 24 close to the second battery module 25 .

[0103] In this way, by providing the buffer pad 352 , the friction between the circuit board 32 included in the first sampling component 35 and the end plate 21 of the first battery module 24 can be effectively avoided, thereby extending the service life of the first sampling component 35 .

[0104] The buffer pad 352 may be located in the area between the circuit board 32 of the first sampling component 35 and the end plate 21 of the first battery module 24 close to the second battery module 25, that is, there is an overlapping area between the orthographic projection of the buffer pad 352 at the bottom of the lower box 11 and the orthographic projection of the end plate 21 of the first battery module 24 close to the second battery module 25 at the bottom of the lower box 11; the buffer pad 352 may also be located in the area between the circuit board 32 of the first sampling component 35 and the end plate 21 of the first battery module 24 close to the second battery module 25. There are overlapping areas between the end plates 21 of the pool module 25, and between the circuit board 32 of the first sampling component 35 and the end plate 21 of the second battery module 25 close to the first battery module 24, that is, the orthographic projection of the buffer pad 352 on the bottom of the lower box 11 and the orthographic projection of the end plate 21 of the first battery module 24 close to the second battery module 25 on the bottom of the lower box 11, and the orthographic projection of the end plate 21 of the second battery module 25 close to the first battery module 24 on the bottom of the lower box 11.

[0105] In combination with the above, when the first socket 363 included in the first socket 361 is located directly above the end plate 21 of the second battery module 25, the buffer pad 352 may be located in the area between the circuit board 32 of the first sampling component 35 and the end plate 21 included in the first battery module 24 close to the second battery module 25 to avoid friction between the circuit board 32 included in the first sampling component 35 and the end plate 21 included in the first battery module 24.

[0106] In some embodiments, in combination with the above-mentioned sampling component 30 including a plurality of sampling terminals 33, as Figure 7 As shown, the second sampling component 36 includes a circuit board 32 having a second redundant section 322 , and the second redundant section 322 is located between the first socket 361 and a sampling terminal 33 among the plurality of sampling terminals 33 that is adjacent to the first socket 361 .

[0107] In this way, when the first socket 361 is limited on the isolation plate 31 included in the second sampling component 36, the second redundant segment 322 on the circuit board 32 included in the second sampling component 36 can provide a certain assembly margin, so as to ensure that the fixing hole 364 on the first fixing plate 362 included in the first socket 361 is sleeved on the first hot melt column 311 of the isolation plate 31, that is, to ensure the smooth limitation of the first socket 361 on the isolation plate 31; at the same time, to ensure that the circuit board 32 included in the second sampling component 36 has a certain stretching margin, so as to slow down the pulling of the circuit board 32 included in the second sampling component 36 when the battery cell included in the second battery module 25 expands, so as to avoid the circuit board 32 from being torn due to pulling.

[0108] In the embodiment of the present application, the multiple battery cells 22 included in the battery module 20 may be connected in series or in series-parallel, and the number of corresponding busbars 34 is different when the multiple battery cells 22 are connected in different relationships. The fewer the number of busbars 34, the fewer the metal traces on the circuit board 32 included in the sampling component 30, and the more the number of busbars 34, the more the metal traces on the circuit board 32 included in the sampling component 30. For example, each battery module 20 includes 12 battery cells 22. When the 12 battery cells 22 are connected in parallel and then in series, the sampling component 30 includes 7 busbars 34, and the circuit board 32 has corresponding 7 metal traces; when the 12 battery cells 22 are connected in series, the sampling component 30 includes 13 busbars 34, and the circuit board 32 has corresponding 13 metal traces.

[0109] For example, the battery management system 40 is located on the side of the second battery module 25 away from the first battery module 24. At this time, the operating parameters of the battery cells 22 collected by the first sampling component 35 can be transmitted to the battery management system 40 through the second sampling component 36. At this time, the circuit board 32 included in the second sampling component 36 is not only used to collect the operating parameters of the second battery module 25, but also used to transmit the operating parameters of the first battery module 24. At this time, combined with the above, when the battery cells 22 included in the battery module 20 are connected in series and parallel, the circuit board 32 included in the second sampling component 36 has 14 metal traces; when the battery cells 22 included in the battery module 20 are connected in series, the circuit board 32 included in the second sampling component 36 has 26 metal traces.

[0110] The more metal traces there are, the more complicated the design of the circuit board 32 is. Therefore, in order to simplify the design of the circuit board 32 included in the second sampling component 36, the circuit board 32 included in the second sampling component 36 can be one or more. When the second sampling component 36 includes one circuit board 32, the circuit board 32 is not only used to collect the operating parameters of the battery cells 22 included in the second battery module 25, but also used to transmit the operating parameters of the battery cells 22 included in the first battery module 24; when the second sampling component 36 includes multiple circuit boards 32, for example, the second sampling component 36 includes two circuit boards 32, the two circuit boards 32 are stacked, and one of the two circuit boards 32 is used to collect the operating parameters of the battery cells 22 included in the second battery module 25, and the other circuit board 32 is used to transmit the operating parameters of the battery cells 22 included in the first battery module 24.

[0111] The specific number of circuit boards 32 included in the second sampling assembly 36 can refer to the number of battery modules 20 arranged in the battery compartment along the length direction X of the battery box 10. Next, take the example of a first battery module 24 and a second battery module 25 arranged adjacent to each other in the length direction X of the battery box 10 in the battery compartment. Figure 6 As shown, the circuit board 32 of the second sampling component 36 includes a circuit acquisition board 324 and a circuit transmission board 325, which are stacked, and the first socket 361 is located at the end of the circuit transmission board 325 away from the battery management system 40 to facilitate connection with the socket 351 on the circuit board 32 included in the first sampling component 35; the ends of the circuit acquisition board 324 and the circuit transmission board 325 close to the battery management system 40 are both connected to the battery management system 40.

[0112] In this way, the second sampling component 36 is configured to include a circuit acquisition board 324 and a circuit transmission board 325 to simplify the arrangement of metal traces on the circuit board 32 included in the second sampling component 36 , and to facilitate the arrangement of the circuit board 32 included in the second sampling component 36 on the isolation board 31 included in the second sampling component 36 .

[0113] Among them, the circuit acquisition board 324 and the circuit transmission board 325 are both flexible thin plates with metal routing, and the multiple sampling terminals 33 included in the second sampling component 36 are connected to the circuit acquisition board 324, so that the circuit acquisition board 324 can collect the operating parameters of the battery cells 22 included in the second battery module 25, and the circuit transmission board 325 can transmit the operating parameters of the battery cells 22 included in the first battery module 24.

[0114] The circuit acquisition board 324 may be located between the circuit transmission board 325 and the isolation board 31, or Figure 6As shown, the circuit transmission board 325 is located between the circuit acquisition board 324 and the isolation board 31. Taking the circuit transmission board 325 located between the circuit acquisition board 324 and the isolation board 31 as an example, combined with the above, two rows of second heat-melting columns 313 may be provided on the isolation board 31 along the length direction X of the battery box 10, the circuit transmission board 325 is located between the two rows of second heat-melting columns 313, and the circuit acquisition board 324 is directly limited on the second heat-melting columns 313. In addition, when limiting the circuit transmission board 325 and the circuit acquisition board 324, at least one of the two opposite surfaces of the circuit transmission board 325 and the circuit acquisition board 324 may be provided with an insulating film layer, or an insulating film layer may be provided between the circuit transmission board 325 and the circuit acquisition board 324, so as to ensure the insulation between the circuit transmission board 325 and the circuit acquisition board 324.

[0115] Alternatively, if Figure 8 ,as well as Fig.10 or Fig.11 As shown, the circuit transmission board 325 has a third redundant section 3254 close to the first plug socket 361. In this way, the third redundant section 3254 close to the first plug socket 361 is provided on the circuit transmission board 325 to ensure that the end of the circuit transmission board 325 close to the first plug socket 361 has a certain stretch margin, so as to reduce the pulling of the circuit transmission board 325 when the battery cells included in the second battery module 25 expand, and avoid the circuit transmission board 325 from being torn due to pulling.

[0116] Wherein, in the case where the circuit transmission board 325 is located between the circuit collection board 324 and the isolation board 31, in order to prevent the battery cells 22 included in the second battery module 25 from expanding, causing the third redundant section 3254 on the circuit transmission board 325 to swell and then support the circuit collection board 324, the third redundant section 3254 can be located between the end of the circuit collection board 324 close to the first socket 361 and the first socket 361, so as to realize the exposure of the third redundant section 3254; or Fig.10 or Fig.11 As shown, the end of the circuit acquisition board 324 near the first socket 361 has a notch 3242, and the third redundant section 3254 is exposed at the notch 3242 on the circuit acquisition board 324. In this way, the exposure of the third redundant section 3254 on the circuit transmission board 325 can prevent the expansion of the battery cell 22 from causing the third redundant section 3254 to swell and affect the circuit acquisition board 324, thereby ensuring that the circuit acquisition board 324 can effectively collect the operating parameters of the battery cell 22 included in the second battery module 25.

[0117] In addition, the setting of the notch 3242 at the end of the circuit acquisition board 324, in addition to being able to expose the third redundant segment 3254 of the circuit transmission board 325, also saves materials for the circuit acquisition board 324 and reduces the weight of the circuit acquisition board 324, while facilitating the heat dissipation of the circuit transmission board 325 along the notch 3242, thereby improving the heat dissipation effect of the circuit transmission board 325; furthermore, based on the setting of the notch 3242, the circuit acquisition board 324 can be designed to prevent fooling around, so as to accurately identify the setting position of the second socket 3241 on the circuit acquisition board 324.

[0118] In some embodiments, Figure 8 and Fig.12 As shown, the circuit acquisition board 324 has a second socket 3241 at the end close to the battery management system 40 (not shown in the figure), and the circuit transmission board 325 has a third socket 3251 at the end close to the battery management system 40. The second socket 3241 and the third socket 3251 are both fixed on the isolation plate 31 included in the second sampling assembly 36, and are both electrically connected to the battery management system 40. In this way, the second socket 3241 and the third socket 3251 respectively provided on the circuit acquisition board 324 and the circuit transmission board 325 can be connected to the battery management system 40, so as to simplify the connection between the circuit acquisition board 324, the circuit transmission board 325 and the battery management system 40.

[0119] Optionally, the structures and fixing methods of the second socket 3241 and the third socket 3251 may refer to the structures and fixing methods of the first socket 361 described above. Fig.12 As shown, the second socket 3241 includes a second fixed plate 3243 and a second plug-in base 3244, and the third socket 3251 includes a third fixed plate 3252 and a third plug-in base 3253; the second fixed plate 3243 and the third fixed plate 3252 are both fixed on the isolation plate 31 included in the second sampling component 36, the second plug-in base 3244 is fixed on the second fixed plate 3243, and the third plug-in base 3253 is fixed on the third fixed plate 3252.

[0120] Furthermore, the second plug-in base 3244 and the third plug-in base 3253 may be both located on a side of the end plate 21 included in the second battery module 25 away from the bottom of the lower box 11. In this way, the distance between the second plug-in base 3244, the third plug-in base 3253 and the battery management system 40 is shortened. At the same time, after the second plug-in base 3244 and the third plug-in base 3253 are connected to the battery management system 40 through the wire harness 50, the wire harness 50 can be effectively prevented from contacting the end plate 21 of the second battery module 25, thereby preventing the wire harness 50 from contacting the end plate 21 of the second battery module 25, and extending the service life of the wire harness 50.

[0121] The embodiment of the present application also provides an electric device, which includes the energy storage device 100 described in the above embodiment, and the energy storage device 100 supplies power to the electric device. Thus, in combination with the above, the electric device of the present application is convenient to improve the working stability of the electric device based on the power safety of the energy storage device 100 during use.

[0122] In the embodiments of the present application, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0123] In the description of the implementation methods of the present application, it needs to be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the implementation methods of the present application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the implementation methods of the present application.

[0124] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the implementation of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0125] The above are only preferred embodiments of the implementation methods of the present application, and are not intended to limit the implementation methods of the present application. For those skilled in the art, the implementation methods of the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the implementation methods of the present application shall be included in the protection scope of the implementation methods of the present application.

Claims

1. An energy storage device, characterized in that: include: A battery box (10) comprises a lower box (11) and a box cover (12), wherein the box cover (12) is connected to the lower box (11) to enclose a battery compartment; A plurality of battery modules (20) located in the battery compartment, each of the battery modules (20) comprising a pair of end plates (21) arranged opposite to each other, and a plurality of battery cells (22) located between the pair of end plates (21), the plurality of battery modules (20) comprising a first battery module (24) and a second battery module (25) adjacent to each other in the length direction of the battery box (10); A plurality of sampling assemblies (30) corresponding one to the plurality of battery modules (20), and each sampling assembly (30) comprises an isolation plate (31) and a circuit board (32), wherein the isolation plate (31) covers a plurality of battery cells (22) of the corresponding battery module (20), and the circuit board (32) is located on a side of the isolation plate (31) away from the battery cells (22), and is connected to the plurality of battery cells (22) of the corresponding battery module (20); The plurality of sampling components (30) include a first sampling component (35) and a second sampling component (36) corresponding to the first battery module (24) and the second battery module (25), respectively; the end of the circuit board (32) included in the first sampling component (35) close to the second sampling component (36) includes a plug connector (351); the end of the circuit board (32) included in the second sampling component (36) close to the first sampling component (35) includes a first socket (361); the first socket (361) is fixed on the isolation plate (31) included in the second sampling component (36); and the plug connector (351) is plugged into the first socket (361); The first socket (361) comprises a first fixing plate (362) and a first plug-in base (363), the first fixing plate (362) having a fixing hole (364), the second sampling assembly (36) comprising an isolation plate (31) having a first hot melt column (311), the end of the first hot melt column (311) having a first cap, the fixing hole (364) being sleeved on the first hot melt column (311), and the first cap being crimped on the first fixing plate (362), the first plug-in base (363) being fixed on the first fixing plate (362), and the first plug-in base (363) being plugged into the plug connector (351); the first hot melt column (311) having a first step surface (312) facing the first cap, and the first fixing plate (362) being supported on the first step surface (312); The energy storage device (100) comprises a battery management system (40), the battery management system (40) being located in the battery compartment and on a side of the second battery module (25) away from the first battery module (24); the circuit board (32) of the second sampling component (36) comprises a circuit acquisition board (324) and a circuit transmission board (325), the circuit acquisition board (324) and the circuit transmission board (325) being stacked, and the first socket (361) being located on the circuit transmission board (325). An end away from the battery management system (40) and an end of the circuit acquisition board (324) close to the battery management system (40) has a second socket (3241), and an end of the circuit transmission board (325) close to the battery management system (40) has a third socket (3251); the second socket (3241) and the third socket (3251) are both fixed on an isolation plate (31) included in the second sampling assembly (36), and are both electrically connected to the battery management system (40).

2. The energy storage device according to claim 1, characterized in that The circuit board (32) included in the first sampling component (35) has a first redundant section (321), and the first redundant section (321) is located on the end of the circuit board (32) close to the plug connector (351).

3. The energy storage device according to claim 1, characterized in that: At least a portion of the first plug-in base (363) is located directly above an end plate (21) of the second battery module (25) that is close to the first battery module (24), and the first plug-in base (363) is plugged into the plug connector (351).

4. The energy storage device according to claim 1, characterized in that: The circuit board (32) included in the first sampling component (35) has a buffer pad (352) on its surface facing the first battery module (24); The buffer pad (352) is at least located in a region between the circuit board (32) and an end plate (21) of the first battery module (24) that is close to the second battery module (25).

5. The energy storage device according to claim 1, characterized in that: Each sampling assembly (30) of the plurality of sampling assemblies (30) comprises a plurality of bus bars (34) and a plurality of sampling terminals (33); The plurality of busbars (34) are located on a side of the isolation plate (31) away from the battery cells (22), and each of the busbars (34) is connected to a plurality of the battery cells (22); the plurality of sampling terminals (33) are spaced apart along the length direction of the circuit board (32) and are all connected to the circuit board (32); and one sampling terminal (33) is connected to one busbar (34); The circuit board (32) included in the second sampling component (36) has a second redundant section (322), and the second redundant section (322) is located between the first socket (361) and a sampling terminal (33) among the plurality of sampling terminals (33) that is immediately adjacent to the first socket (361).

6. The energy storage device according to claim 1, characterized in that: The second plug socket (3241) comprises a second fixing plate (3243) and a second plug base (3244), and the third plug socket (3251) comprises a third fixing plate (3252) and a third plug base (3253); The second fixing plate (3243) and the third fixing plate (3252) are both fixed on the isolation plate (31) included in the second sampling assembly (36), the second plug-in base (3244) is fixed on the second fixing plate (3243), the third plug-in base (3253) is fixed on the third fixing plate (3252), and the second plug-in base (3244) and the third plug-in base (3253) are both located on a side of the end plate (21) included in the second battery module (25) away from the bottom of the lower box (11).

7. The energy storage device according to claim 1, characterized in that: The circuit transmission board (325) is located between the circuit collection board (324) and the isolation board (31); The circuit transmission board (325) has a third redundant section (3254) close to the first socket (361), and the end of the circuit acquisition board (324) has a notch (3242), and the third redundant section (3254) is exposed at the notch (3242).

8. The energy storage device according to any one of claims 1 to 5, characterized in that: The circuit board (32) has a limiting hole (323), the isolation plate (31) is provided with a second hot melt column (313), the end of the second hot melt column (313) has a second cap, the limiting hole (323) is sleeved on the second hot melt column (313), and the second cap is located on a side of the circuit board (32) away from the isolation plate (31).

9. The energy storage device according to claim 8, characterized in that: The isolation plate (31) has a first limiting groove (314), the circuit board (32) is located in the first limiting groove (314), the bottom of the first limiting groove (314) is provided with the second hot melt column (313), and the groove wall of the first limiting groove (314) has an avoidance groove (315) corresponding to the second hot melt column (313).

10. The energy storage device according to any one of claims 1 to 5, characterized in that: The end plate (21) is an insulating plate and has a second step surface (214) facing away from the bottom of the lower box (11), and a mounting hole (211) on the second step surface (214) that penetrates the end plate (21) along the height direction of the battery box (10); The battery module (20) comprises a locking bolt (212), the locking bolt (212) having a locking cap (213), the locking bolt (212) passing through the mounting hole (211) and fixedly connected to the bottom of the lower box (11), and the locking cap (213) abuts against the second step surface (214).

11. An electrical device, characterized in that: The electrical equipment comprises the energy storage device (100) according to any one of claims 1 to 10 above, and the energy storage device (100) supplies power to the electrical equipment.

Images